Harborne Walkway appears to have been renamed Harborne Green Route, presumably to make it more inclusive. It starts half way down Northbrook Street, where a gap has been placed in the cycleway and a new section of path has been built (on the opposite side of the road) to make it easier to join the green route. If you look very carefully, you may be able to see small silvery domes on the top side of the divider. Their intended purpose is unknown to me, but maybe they reflect headlights. If you know, please tell us!